She told the Press Association: “I spent the whole movie defending Lily to people on set who were just like ‘God she’s so awful, look what she’s just done’ and I’m like ‘you can’t talk about my character that way, I’m her right now. I have to be able to defend the things that she’s doing.’

“But I keep articles of clothing from each of my characters because I really love them and for Lily I just had to leave everything there.

She said: “When I first read it I was absolutely blown away and it was the only thing I could think of.

“Olivia was actually already attached and I really wanted to work with her.

“And I think these two women are manipulating each other through dialogue throughout the entirety of the movie and everyone has got an ulterior motive and nothing is what it seems and that just seems so interesting to play, especially with another young woman.

“It felt like it was too good to give up. I nearly chased Cory out of a hotel room, being like ‘you didn’t tell me I got the part yet’.”